论文部分内容阅读
采用大田试验法研究了玉米生育期内土壤微生物量碳和酶活性动态变化特征。结果表明 :玉米播种后 ,土壤微生物量碳、脲酶、磷酸酶、纤维素酶和转化酶活性迅速上升 ,约在播种后 6 0d达到最大值 ,然后开始下降 ,约在播种后 90d出现低谷 ,随后缓慢上升 ,约在播种后 115d出现第 2个小峰值 ,然后平稳下降。几种处理相比较 ,以玉米根茬留田 +NPK处理的土壤微生物量碳和各类酶活性为最大。
Field experiments were conducted to study the dynamic changes of soil microbial biomass carbon and enzyme activities during maize growth. The results showed that the activities of soil microbial biomass carbon, urease, phosphatase, cellulase and invertase increased rapidly after sowing, reaching the maximum at about 60 days after sowing, and then began to decrease, about trough 90 days after sowing, Slowly rising, about the second small peak 115d after sowing, and then decline steadily. Compared with the other treatments, the soil microbial biomass carbon and the activities of all kinds of enzymes under corn root stubble treatment + NPK treatment were the largest.